Improvement in grain-separators



J'. W. JOHNSON.

GRAIN-SEPARATQR. I No.177,25Z. Patented... May 9,1876- N. PETERS,PHOTO-UTHOGRAPHER, WASHINGYON D. C.

JOHN w. JOHNSON, or TowANnA, PENNSYLVANIA, ASSIGNOR To UNiTE'D STATESFANNING MILL oo rANY, OE SAME PLAcE.

IMPROVEMENT IN GRAiN-SEPARATORS. I

Specification forming part of Letters Patent No. 77,252, dated May 9,1876; application filed May 4,1876.

To all whom it may concern:

Be it known that I, JOHN W. JOHNSON, of Towanda, county of Bradford,State of Pennsylvania, have invented certain new and useful Improvementsin Fanning-Mills and Grain- Separators, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, making part of this specification, in which-Figure 1 represents a vertical longitudinal section through afanning-mill and separator, having my improvements applied. Figs. 2 2"represent a plan view and a longitudinal section through the lower longscreen. Figs. 3 3 represents similar views of the grass-seed separatorand screen, and Fig. 4 represents a vertical transverse section throughthe separatorscreen frame and screens.

Similar letters of reference denote corresponding parts wherever used.

My invention has for its object the improvement of the machine uponwhich Letters Patent were granted to me July 27 1875, in which alongitudinally-reciprocating, long, double screen or separator wasarranged within the machine-frame, underneath the transverselyvibratingshoe, and disconnected therefrom, for separating and cleaningseed-grain;and the present improvement consists in combining the longseparator-screens with a grooved reciprocating frame, mounted onrollers, adapted to run on an adjustable frame or ways, and connectedwith the rock-shaft, from which it receives its vibrations through themedium of a crank-arm and pivoted or jointed link, arranged centrallyunderneath the screen-frame,

, for facilitating and steadying the movements of said frame.

In the accompanying drawings, A represents the frame-work of themachine, and B the shoe, with its usual screens, arranged within theframe or casing A; said parts in their organization or generalarrangement and operation being similar to what is described in myformer patent, referred to; or any usual or preferred construction maybe employed.

Underneath the shoe, and near the bottom of the main-frame casing, is aframe composed,

' preferably,of two parallel longitudinal bars,

0 G, inclined in an opposite direction to the screens in the shoe, andpivoted at their rear lower ends to the main-frame casing, one upon eachside. The forward or upper ends are connected rigidly by a transverse ymeans of which the bars or frame C may be vibrated or adjusted forchanging their angle of inclination, a pin, passing through any one of aseries of perforations in the casing, serving to hold the forward end ofthe frame at the desired adjustment. is a long rectangular screenframe,consisting of two longitudinal side bars,D l), grooved on their innerfaces for the reception of the screens, and rigidly connected bytransverse strips or bars d d and d attached to the lower faces of barsD, as shown in Fig. 1, the two, (1 d, uniting the bars D at their ends,while the bar d is placed intermediate, sufficiently removedfrom therear bar d to form a passage at d for grain or seed, aid bar serving asthe point of attachment for the jointed pitman or connecting-rod ff..The frame-bars D D are mounted on rollers e e, which rest and moveback'and forth on the frame-bars O, and little spurs c c or corrugationson the upper face of said bars 0, within the path or throw of therollers e, serve as the screen-frame D is reciprocated to impart ajolting or knocking' movement to said frame, and-thus to assist in theoperation of Separating the grain, 850., by keeping the meshes of thebolt clear. The bar d of the screen-frame has rigidly connected with it,midway of its length, a block or arm, f, forming one part of the pitman,and to this arm one end of the part or armf is pivoted, the other endbeing pivoted to a crank-arm, g, on a rock-shaft or bar, G, to whichmotion. is imparted by any convenient arrangement of drivingdevices,preferably that described in my former patent, referred to. Bythis central arrangement 'of the pitman ff cramping or binding of thescreen-frame is avoided, while by the jointing of the pitman. or rod f fit is adapted to permit all necessary adjustments of the frame 0 and thevarying relations between the bar d and the rock-shaft G. For simplyseparating seed-grain, a plain wire screen, h, is employed inserted inthe upper groove of frame D, having Above the frame 0 to saveseparatelythe smaller. or shriveled' grain, the screen It is placed inthe frame D,

underneath the screen h, and a valve, h, near its lower end, and overthe opening 01 is removed, and a box or receptacle 1s placed underneathsaid opening, to receivethesmaller grain from the screen k while theplump grains are passed out at the tail end of the upper screen It, asbefore.

Where it is desired to separate grass-seed" from the grain, and toseparate it from impurities and save it, a loWerdouble-screeu grass-seedseparator or slide isv employed, either alone or in connection with anupper slide, h or h, as described.

This slide consists of a rectangular frame, I, having a broad tail-pieceor board, 1 let in flush with the upper faces of the sidebars,

l and the opening through the said frame is I claim as new, and'desiretosecure by Letters Patent, is

covered by a wire cloth, '5, through which the grass and other smallseed, together with the impurities, can pass, while the grain passesmouuted on friction=rollers on the adjustable jframe O U, in comhihationwith the jointed down over the screen and tail-board, escaping at thelower end, as before. The frame or slide I, the bars of which are fromone-half i rock-shaft G, arranged centrally of' the width 1 of thescreen-frame, and, underneath'thesame, and operating as described.

to three-quarters of an inch thick, adapting it to slide in the groovein the frame D, is covered on its lower face with a second wire gauze orscreen, i, of finer mesh than the screen t, and adapted toretaiu thegrass-seed,

while permitting thefiner seedand impurities to pass through.Thegrass-seed passes down over the screen 11 and escapes over a narrowtail-piece or hoard,1 into asuitahle receptacle arranged within themachine-frame, and underneath the discharging end of the screen 2" andtail-board 1 a By the addition of the lower screen. if and'the-boardHitwill be seen that the single slide Iiis made to perform.the: function of a double screen, and a thorough separation of the grainand grass-seed from each other is. effected, and of both' from the chaffand other impurities. The ordinary cleaning of the grain is effectedthrough the upper screen, mounted in the shoe B, in the usual manner;but for seed-grain, and the other purposes described above, the grain isdischarged from the. shoe upon the screens of the lower longitudinallyreciprocating frame D; and there operated upon as described. v i

The screend'rame' D, with its supporting frame or ways 0, maybe appliedto any of 1 the various formsor constructions offannin-g ,mills incommon use; and a particular description of. the mill itself is,therefore, um

necessary.

Having now described my invention, what The grooved reciprocatingscreemframe D.

connecting-rod f f, and crank-arm g on the" JOHN W'. JOHNSON. WitnessesALEXANDER MAHON, JOHN G. CENTER.

